Securing means for windows of oven-doors.



No. 860,691. PATENTED JULY 23, 1907. e. F. moss.

SECURING MEANS FOR WINDOWS OP OVEN DOORS.

APPLICIATION FILED JAN. 18. 1907.

UNITED STATES PATENT OFFICE.

GEORGE F. PROSS, OF CINCINNATI, OHIO, ASSIGNOR TO THE E. H. HUENEFELDCOMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

SECURING MEANS FOR WINDOWS OF OVEN-DOORS.

Specification of Letters Patent.

Patented July 23, 1907.

Application filed January 18, 1907. Serial No. 352,856.

f0 all whom it may concern:

Be it known that I, GEORGE F. Pnoss, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Securing Means forWindows of Oven-Doors, of which the following is a specification.

My invention relates to securing means for the windows in the doors ofportable ovens, such as the ovens used in connection with gas, gasoleneor other vapor stoves. It will be understood that ovens of thischaracter are made of sheet metal, the doors being also made of sheetmetal, and that in modern practice it has become the custom to providethe doorwith an opening covered by transparent material, usually glass,through which the interior of the oven may be viewed.

It is the object of my invention to provide novel securing means wherebythe glass may be readily and firmly secured to the oven-door by meanswhich are cheap in construction and readily applied and which present aneat appearance after being applied, and when applied cause a closejunction between the sheet metal of the door and the transparent sheetfor preventing the loss of heat from the oven while providing for awindow of considerable area through which the interior of the oven maybe viewed.

The invention will be further readily understood from the followingdescription and claims, and from the drawing, in which latter:

Figure 1 represents a perspective view of an oven having my improveddevice applied thereto. Fig. 2 is a plan view of my improved device withthe oven door broken away. Fig. 3 is a cross-section of the same on theline of Fig. 2. Fig. 4 is a cross-section of the same on the line y y ofFig. 2. Fig. 5 is a plan view of the retaining clip. Fig. 6 is anenlarged plan view of my improved device partly broken away showing theapplication in enlarged view of the retaining clip. Fig. 7 is across-section of the same on the line zz of Fig. 6; and, Fig. 8 is adetail in perspective showing the corner of the opening of the innersheet which receives the clip.

1 represents the oven and 2 is the door thereof, suitably hinged theretoand which when open may be held by chains 3. I

4 is the window of the oven door and is of glass or may be of othertransparent substance. The door is made of sheet metal and comprises anouter sheet 5 and an inner sheet 6 suitably secured together at theedges, there being a space 7 between said sheets, the sheets mergingtoward their edges where they are joined. The outer sheet has an opening8 surrounded by a bead 9 which merges into a lip 10 inside the bead forforming the edge of the opening, which is shown annular. The inner sheet6 is provided with an opening 11 shown square in form. There is a ledge12 at the edge of this opening for receiving the glass. This ledge iscountersunk, having a side wall 13. The ledge is interrupted at each ofthe corners of the opening for forming a space 14. The ledge 12 lies tooutside the lip 10 and is sunk to the lateral plane of the inner edge ofsaid lip so that when the glass is received by said ledge it may contactthe said lip for making a close joint between the lip and the glass toprevent the escape of heat from the oven.

The inner plate, at the opening, is provided with tongues 15, of which Ihave shown two at corners of the opening. These tongues are preferablyintegral with the inner sheet. The respective corners of the glass arearranged to be inserted under these t ngues and above the ledge adjacentthereto. Clips 16 are adapted to be inserted in the inner sheet at theother corners of said glass, the glass resting on the ledge and theclips extending over the glass. This construction secures the glassbetween the ledge and the tongues 15 and clips 16. I prefer to give'eachtongue a slight bend toward the outer plate so that its edge 17 may vcontact the glass'with resilient pressure so that different thicknessesof glass may be accommodated and held securely.

The clips 16 comprise a head 18 and a shank 19, the sides 20 of the headpreferably having an angle to correspond with the angle of the sides 21of the opening 11 so that when the clips are in place their heads 18 maycorrespond as near in appearance as possible to the tongues 15. Thetongues are formed up out oi the metal cut away to form theinterruptions or spaces 14 in the ledge of the inner sheet at thosecorners where the tongues are located, and the shanks of the clips 16are inserted through the interruptions or spaces 14 at those cornerswhere said clips are located. I provide the inner sheet with slots 2223, forming a web 24- between said slots. I prefer to sink this web forforming a groove connecting the mating slots. The shank of the clip isinserted through the interruption or space 14 and the mating slots,above the web, the shank lying in the groove.

I prefer to provide an annular bead 25 surrounding the opening 11 of theinner sheet, the said bead extending inwardly between the sheets. I alsoprefer to provide the clip with an outwardly extending knob 26 at thepoint where, when the clip is inserted, the knob may impinge the wall 27of the slot 22 so as to retain the clip in position. This knobpreferably also impinges the outer edge of the bead 25,as the outer edgeof the bead and the inner wall of the slot 22 are preferably coincident.There is suflicient resilience in the metal to permit the shank with itsknob to be inserted, the knob however preventing accidental retractionof the clip. This knob may be used as a protection, but the resilienceof the metal is sullicient to hold the parts in place Without itsemployment if this is desired. In order that the shank may be readilyinserted, I prefer to provide the inner edge of the web 24 with a slightbend 28 for widening the mouth of the slot 22.

Having thus fully described my invention What I claim as new and desireto secure by Letters Patent is:

1. In combination, a door for a portable oven comprising an outer sheetand an inner sheet, the said inner sheet having an opening, atransparent sheet received by said opening, and a clip for retainingsaid sheet in place comprising a head above said transparent sheet and ashank, the said inner sheet being provided with a slot for receiv ingsaid shank.

2. In combination. a door for a portable oven comprising an outer sheetand an inner sheet, the said inner sheet having an opening, atransparent sheet received by said opening, and a clip for retainingsaid sheet in place, said clip comprising a head above said transparentsheet and a shank, the said inner sheet being'provided with a pluralityof slots having a web therebetween, the said shank extending throughsaid slots above said web with the inner end of said shank receivedunder said inner sheet, substantially as described.

3. In combination, a door for a portable oven comprising an outer sheetand an inner sheet, the said inner sheet having an opening, atransparent sheet received by said opening, and a clip for retainingsaid sheet in place, said clip comprising a head above said transparentsheet and a shank, the said inner sheet being provided with a pluralityof slots having a web therebetween, the said shank having a knob forimpinging the wall of one of said slots and thereby holding the clipagainst retraction, substantially as described.

4. In a securing means for windows of oven doors, the combination withthe inner and outer sheets of the oven door, each of said sheets havingan opening, the said inner sheet having a countersunk ledge at the wallof said opening with integral tongues on said inner sheet at saidopening, a transparent sheet above said countersunk ledge and under saidintegral tongues, and clips respectively provided with a head above saidtransparent sheet and a shank, the said inner sheet having a pluralityof mating slots therein for each of said shanks with connecting webtherebetween, the said shanks respectively inserted through said matingslots and above said web therebetween, substantially as described.

5. In combination, an oven door having an outer sheet with an openingtherein and having an annular lip surrounding said opening extendinginwardly, an inner sheet having an opening therein registering inposition with said outer opening, said inner sheet at its opening havingan inwardly extending countersunk ledge located to the side outside theinner edge of said annular lip, said inner sheet being also providedwith integral retaining tongues, a transparent sheet resting on saidledge and received under said integral tongues, the said inner sheetbeing provided at a plurality of places adjacent said inner opening witha plurality of mating slots and connecting web therebetween, and clipseach having a head impinging the outer side of said transparent sheetand a shank inserted through said respective mating slots and above saidweb therebetween and under said inner sheet adjacent said head, the saidinner sheet covering the outer end of said shank, substantially asdescribed.

6. In securing means for windows of oven doors, the combination, withthe inner and outer sheets of the oven door, the said sheets havingregistering openings, the said outer sheet having a lip surrounding itsopening, the said inner sheet having a ledge about its opening locatedto the side of and outside the said lip, the said ledge beingcountersunk to the lateral plane of said lip for permitting thetransparent plate to impinge said lip, of a clip adapted to impinge theinner side of said transparent plate, said clip having a shank and saidinner sheet having a plurality of slots and intervening web for saidshank. substantially as described.

7. In securing means for windows of oven doors, the combination, withthe inner and outer sheets of the oven door, the said sheets havingregistering openings, thesaid outer sheet having a lip surrounding itsopening, the said inner sheet having a ledge about its opening locatedto the side of and outside the said lip, the said ledge beingcountersunk to the lateral plane of said lip for permitting thetransparent plate to impinge said lip, of a clip adapted to impinge theinner side of said transparent plate, said clip having a shank with aknob thereon and said inner sheet having a plurality of slots andintervening web for said shank with said knob impinging the inner wallof one of said slots, substantially as described.

In testimony whereof I have subscribed my name hereto in the presence oftwo subscribing witnesses.

GEORGE F. PROSS.

Witnesses:

THEODORE C. JUNG, MAYME WALTER.

